JPH04132616U - Optical pick-up feeder - Google Patents

Abstract

(57) [Abstract] [Purpose] In a laser disc player, the movement of the optical pickup becomes unstable due to changes in the meshing of the teeth of the rack gear and pinion gear due to placing the optical pickup feed motor outside the tilting table. The purpose of this invention is to provide an optical pickup feeding device that is inexpensive and has excellent characteristics. [Configuration] Pinion gear 7 is located close to tilt axis 9.
By providing this, even if the tilt base is tilted, the contact position between the rack gear 5 and the pinion gear 7 is unlikely to change. Furthermore, by providing elasticity to the connecting portion between the rack gear 5 and the optical pickup 1, the contact angle between the rack gear 5 and the pinion gear 7 is unlikely to change even when the tilt base 3 is tilted. As described above, even when the optical pickup feeding motor 8 is provided outside the tilt stand 3, a stable optical pickup feeding device can be obtained.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention can be used in optical recording/playback devices that read or record optical discs. The present invention relates to an optical pickup feeding device that is effective for use in the present invention.

0002

[Conventional technology]

In recent years, the cost of laser disc players in optical recording and playback devices has become lower. The tilt mechanism holds the table on which the optical pickup moves inward and outward with a certain fulcrum. A simplified method using a rotating mechanism is often used.

0003 A conventional optical pickup feeding device will be explained below. FIG. 4 shows a configuration in which a feed motor is provided on a conventional tilt table. Figure 4 In , 1 is an optical pickup or a moving stand integrated with an optical pickup. be. 2 is a spindle motor that rotates the optical disk. 3 is a tilt stand, The optical pickup 1 moves on this. 4 is the guide shaft, along this axis The optical pickup 1 moves. 5 is the rack gear, which rotates the pinion gear 7. By doing so, the optical pickup 1 is moved along the guide shaft 4. 8 is sent It is attached to the tilt base 3 by a motor. 9 is the tilt axis, and this axis line The tilt base 3 rotates around the center. 10 is a turntable, on which an optical disc is placed. Posted.

0004 The operation of the optical pickup feeder configured as above is explained below. I will explain. First, the warpage of the disc (not shown) placed on the turntable 10 Adjust the tilt axis so that the positional relationship with the optical pickup 1 remains constant against deflection. The tilt base 3 rotates around 9. At this time, the feed motor 8 and pinion gear 7 It is located on the tilt stand 3 and rotates together with the tilt stand 3.

[0005]

[Problem that the idea aims to solve] However, in the conventional configuration described above, the optical pickup is placed on the table on which the optical pickup is mounted. Since a motor is installed to move the upper part in the inner and outer circumferential directions, the vibration of the motor There are also problems such as deformation of the table due to the weight of the motor when the player falls. The solution As a solution, it is possible to place the motor outside the table that tilts. If you use a simple configuration in which the rack gear is attached directly to the optical pickup, the As the gear tilts, the position and engagement of the rack gear teeth and pinion gear teeth changes. There was a problem in that the value changed.

[0006] This invention solves the above conventional problems and improves the relationship between rack gear and pinion gear. By making it easier to maintain a constant tension, it is possible to Even if the optical pickup is The aim is to provide it easily and at low cost.

[0007]

[Means to solve the problem]

In order to achieve this purpose, the optical pickup feeding device of the present invention The rack gear, whose length corresponds to the distance the wheel moves, absorbs the elasticity of resin or leaf springs. be coupled to the optical pickup through the material with which the optical pickup is transferred. The pinion gear that transmits the power to move the optical pickup is mounted on a table that tilts the pinion gear. It has a configuration in which it is provided at a position outside the tilt fulcrum and close to the tilt fulcrum.

[0008]

[Effect]

With this configuration, the meshing of the rack gear and pinion gear during tilt operation is Placing the pinion gear near the tilt fulcrum can solve the problem of changes in height and tilt. This reduces the effect of height changes and allows rack gears to be By connecting elastically to the drop, the influence of tilt can be reduced. Ru.

[0009]

【Example】

An embodiment of the present invention will be described below with reference to the drawings.

0010 In Figure 1, 1 is an optical pickup or a transfer unit integrated with an optical pickup. A moving table, 2 a spindle motor, 3 a tilt table rotating around a tilt axis 9, 4 is a guide shaft, 5 is a rack gear that moves the optical pickup 1, and 6 is an elastic The coupling part between the rack gear 5 and the optical pickup 1, which can be bent, 7 is a tilt part. Pinion gear located on the outside fixed side of the stand and moves rack gear 5, 8 is also fixed. There is a feed motor on the side, and 10 is a turntable on which the disc is placed.

[0011] Improvements made by the present invention regarding the optical pickup feeding device configured as described above. The operations of the two points will be explained using FIGS. 2 and 3.

0012 First, FIG. 2(a) is a side view of the device tilted upward about the tilt axis 9. The rack gear 5 also rotates around the tilt shaft 9. Figure 2(b) shows a downward tilt. FIG. 3 is a side view showing a state in which the rack gear 5 is rotated downward, and the rack gear 5 is rotated downward. this As can be seen, the closer the pinion gear 7 is to the tilt axis 9, the closer the pinion gear 7 is to the rack gear 5. The meshing position of the teeth of the pinion gear 7 and the pinion gear 7 is difficult to change in the height direction.

[0013] Next, FIG. 3(a) is a diagram showing an upward tilting operation. rack gear 5 and light If the pickup 1 is firmly connected, the rack gear 5 will be tilted as shown in Fig. 2 (a). , abuts the pinion gear 7 obliquely. However, it is not possible to give elasticity to the joint part 6. Therefore, the rack gear 5 can rotate relative to the optical pickup 1. , the teeth of the rack gear 5 can contact the teeth of the pinion gear 7 in parallel. Ru.

[0014] FIG. 3(b) is a drawing in which the rack gear 5 is tilted downward, and similarly, the rack gear 5 is rotated. The teeth of the rack gear 5 can be brought into contact with the teeth of the pinion gear 7 in parallel. Become.

[0015] As described above, according to this embodiment, the pinion gear can be brought close to the tilt axis. Due to this, the contact position of the rack gear and pinion gear changes in the height direction during tilt operation. It becomes possible to reduce the Also, the connection part between the rack gear and the optical pickup By giving elasticity to the rack gear, even if the tilt base is tilted, the teeth of the rack gear can be brought into contact with the teeth of the pinion gear in parallel. Therefore, Chi Even if the belt base is tilted, the meshing of the teeth of the rack gear and pinion gear remains stable. The optical pickup can be moved smoothly.

[0016]

[Effect of the idea]

As mentioned above, the present invention firstly provides a pinion gear near the tilt fulcrum. , Second, by attaching the rack gear elastically to the optical pickup, We have created an excellent optical pickup feeder that can operate easily and stably. It is possible.

[Brief explanation of drawings]

[Fig. 1] A perspective view of a tilt mechanism and an optical pickup feeding device in an embodiment of the present invention.

[Fig. 2] (a) Side view when tilting upward for explaining the operation of the optical pickup feeding device in the same embodiment (b)
A side view of the optical pickup feeding device in the same embodiment when it is tilted downward to explain the operation thereof.

[Fig. 3] (a) Side view of the optical pickup feeding device in the same embodiment when tilted upward to explain the operation thereof (b)
A side view of the optical pickup feeding device in the same embodiment when it is tilted downward to explain the operation thereof.

[Figure 4] Perspective view of a conventional tilt mechanism and optical pickup feeding device

[Explanation of symbols]

1 Optical pickup 2 Spindle motor 3 Tilt stand 4 Guide shaft 5 Rack gear 6 Elastic joints 7 Pinion gear 8 Optical pickup feed motor 9 Tilt axis 10 Turntable

Claims (2)

[Scope of utility model registration request] 1. An optical pickup feeding device for moving an optical pickup having an optical signal reading function in the inner and outer circumferential directions of an optical disk, wherein the optical pickup drives a pinion gear that drives a rack gear attached to the optical pickup. An optical pickup feeding device, characterized in that the optical pickup is provided at a position close to a rotation fulcrum of a tilt mechanism that rotates a table on which the optical pickup moves so that the optical pickup can be maintained at a constant distance and angle with respect to the optical disk. . 2. A connecting part between the rack and the optical pickup is provided with elasticity so that when the rack gear attached to the optical pickup makes a tilt movement, the tooth surface of the rack gear always contacts the tooth surface of the pinion gear with constant meshing. 2. The optical pickup feeding device according to claim 1, wherein the optical pickup feeding device is provided with a magnetic field.